Remove tabs from SAS code files

June 10, 2014
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Remove tabs from SAS code files

This post was kindly contributed by DATA ANALYSIS - go there to comment and to read the full post. By default, SAS records the indent by pressing the tab key by tab, which causes many problem to use the code files under a different environment. There are actually two ways to eliminate the tab...
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Find your stuff with My SAS

June 3, 2014
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I am forever putting something down and not remembering what I did with it.  I solved this problem for my keys by putting a cute little froggy key hook next to the door. My keys go there as soon as I get home. But at work, I don't have a

n...
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Use recursion and gradient ascent to solve logistic regression in Python

May 21, 2014
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Use recursion and gradient ascent to solve logistic regression in Python

This post was kindly contributed by DATA ANALYSIS - go there to comment and to read the full post. In his book Machine Learning in Action, Peter Harrington provides a solution for parameter estimation of logistic regression . I use pandas and ggplot to realize a recursive alternative. Comparing with the iterative method, the recursion costs more space but may bring...
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Public Types Explorer

May 6, 2014
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Did you know that the SAS metadata server also provides metadata about metadata? Metadata about well known SAS metadata object types (public types) is available in the Foundation metadata repository and includes information about the applicability of the various metadata permissions. To help SAS platform administrators get a better understanding of which permissions apply...
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Spring Thaw in Alberta

May 2, 2014
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Last week I had the great pleasure of flying to Alberta for the Edmonton and Calgary user group meetings. Well, let me say that it mostly a great pleasure... my system was still in a bit of temperature shock having been sunning myself on a St. Lucian b...
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Count large chunk of data in Python

April 30, 2014
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This post was kindly contributed by DATA ANALYSIS - go there to comment and to read the full post. The line-by-line feature in Python allows it to count hard disk-bound data. The most frequently used data structures in Python are list and dictionary. Many cases the dictionary has advantages since it is a basically...
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Example 2014.5: Simple mean imputation

April 25, 2014
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We're both users of multiple imputation for missing data. We believe it is the most practical principled method for incorporating the most information into data analysis. In fact, one of our more successful collaborations is a review of software for ...
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Example 2014.4: Hilbert Matrix

April 14, 2014
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Rick Wicklin showed how to make a Hilbert matrix in SAS/IML. Rick has a nice discussion of these matrices and why they might be interesting; the value of H_{r,c} is 1/(r+c-1). We show how to make this matrix in the data step and in R. We also show t...
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R Continues Its Rapid Growth

April 7, 2014
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This post was kindly contributed by r4stats.com » SAS - go there to comment and to read the full post. I’ve just updated the section below from The Popularity of Data Analysis Software. Note that the overall article is still under construction and all the figure numbers have changed from previous versions. n Growth...
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